Question

我正在尝试在kotlin await / async函数中编写一个示例，该示例应该与c＃await示例相同。它可以正常工作而不会出错，但是我不确定我是否正确理解了它们，也许我创建了太多异步协程。有人可以给我一些建议吗？谢谢。

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/how-to-make-multiple-web-requests-in-parallel-by-using-async-and-await

package diki.test

import kotlinx.coroutines.experimental.async
import kotlinx.coroutines.experimental.runBlocking
import org.apache.commons.lang3.RandomUtils

fun main(args: Array<String>) = runBlocking {
    val start = System.currentTimeMillis()
    startButton_Click().await();
    println("time=" + (System.currentTimeMillis() - start))
}

fun startButton_Click() = async {
    CreateMultipleTasksAsync().await()
}

fun CreateMultipleTasksAsync() = async {
    val d1 = ProcessURLAsync("http://a")
    val d2 = ProcessURLAsync("http://a1")
    val d3 = ProcessURLAsync("http://a111")
    val d1r = d1.await()
    val d2r = d2.await()
    val d3r = d3.await()
}

fun ProcessURLAsync(url: String) = async {
    Thread.sleep(RandomUtils.nextLong(500, 1000))//mock network job
    url.length
}

Answer 1

async/await对于CreateMultipleTasksAsync和startButton_Click是没有用的。只需使其具有suspend函数即可。

为delay而不是Thread.sleep

如何在JVM Kotlin中使用等待或异步？

1 个答案: